It is impossible to book a holiday with you if you do not have a valid UK mobile telephone AND a valid UK address with UK postcode. Period. If you are booking from abroad you obviously have neither. There is a 'Country' box for address which I completed as "The Netherlands", but your totally rubbish software continues to check for UK validity of postcode and telephone. (Omitting either, as a "work around", doesn't work). There is no listed telephone contact number to help resolve problems (+44 1271 870221 does not work any more. Why does the software need to check anyway, I ask myself? Are you actively discriminating against foreign guests even? Terribly bad site and booking procedure. Very "user unfriendly", often to the point of being totally unusable.